Stop-motion for looms.



J. J. SMITH.

STOP MOTION FOR LOOMS. APPLICATION FILED DEC-19. 1914.

1,154A49, PatentedSept. 21, 1915.

STATES PATENT OFFICE.

JOSEPH 3'. SMITH, OF CAMBRIDGE, MASSACHUSETTS; ASSIGTTOB TO WILLIAM FIRTH,

7 OF CHESTNUT HILL, MASSACHUSETTS.

STOP- MOTION FOR LOOKS.

Specification of Letters Patent. Patented Sept. 21, 1915.

Application filed December 19, 1914. Serial No. 878,026.

To all whom, it may concern Be it known that I, Josnrrr J. SMITH, a citizen of the United States, residing at Cambridge, in the county of Middlesex and 5 State of Massachusetts, have invented cer- 19 thereof.

This invention has reference to improvements in stop motions for looms and relates particularly to an improved means operated by or through a moving part of the loom for shifting the shipper lever or device from an inoperative to an operative position at which it may act to stop the loom.

One of the objects of this invention is to provide a shifter device, for a stopping member of a loom, having a magnetically controlled engaging means whereby a very light current of electricity is required to efiect the holding of said engaging means in the operative position.

Another object of the invention is to improve the construction of the vibrator or means for operating the shipper lever engaging device.

Other objects of the invention will appear from'the following description.

The invention consists in the novel construction of the vibrator and its shipper lever engaging device.

The invention also consists in such other novel features of construction and combination of parts as shall hereinafter be more fully described and pointed out in the claims.

Figure 1, represents a side elevation of parts of a loom provided with the improved stop motion, parts of the same being shown in section. Fig. 2, represents a similar view on an enlarged scale of parts of the same.

Fig. 3, represents an end view of portions of the vibrator mechanism of which parts are shown in section.

i through the movement of which the operation of the loom may be arrested. In this improvement, as in other well known shipper lever stop motions, it is to be understood that when the shipper lever B is in the position shown in full lines in Fig. 2 said lever 1s n the inoperative or detained position whlle, when said lever B is shifted or moved to the position shown. in dotted lines in said Flg. 2, lever B is in position to operate any of the ordinary and Well known means for stopping the loom in any manner. The office of the apparatus constituting the subject matter of the present invention, as applied to the shipper lever herein specifically shown, is to effect the movement or shifting of lever B from the position shown in full lines, in said Fig. 2, to the position shown 1n dotted lines therein.

Mounted on the loom frame A is the bracket 5 having. the member 6 having a transverse bore to receive shaft 7 which latter has the enlargement 8 bearing against one slde of member 6 when said shaft is secured in placeby the nut 9. Said shaft 7 has also the shoulder 10 from whicli extends the stud 11 of less diameter than shaft 7 and provided with the screw nut 12 and the washers 13, 14 between which is adjustably secured the slotted member 15 of the guide arm 16 having the upper transversely curved end 17.

On shaft 7 is journaled the bearing 18 having the depending arm'19 and the arm 20 which latter is longer than the guide arm 16 and, at its upper end, has the plate 21 carrying the magnet 22 electrically connected with electric circuit a: z which includes the battery D or other source of electric energy and the terminals T, T, and t, t. Secured in or on said arm 20 is the laterally extending stud 23 on which is pivotally' mounted the puller or actuator member 24 adapted to be sustained by and. to ride on the curved end 17 of the guide arm 16 and having the adjustable hook or engaging device 25 and, at its upper portion, the armature 26. In order to afford cooperation between the hook 25 and the shipper lever B the latter is furnished with the member 27 adapted to be adjusted and having the stud 28 with which the hook 25 may engage at times.

, The arms 19 and 20 with the puller member 24 constitute a vibratory shipper actuator and provision is made for effecting the constant vibratory movement of these parts during the operation of the loom. In the drawings the means shown for this purpose is the rod 29 connected with the arm 19 and having the eccentric strap 30 operating on the eccentric 31 of the shaft 32 which latter is or may be the usual cam shaft of the loom.

The circuit closing means preferably used with this improved stopping device'preferably is somewhat similar to that shown in Letters Patent of the United States No. 851,337, dated April 23, 1907, to Edwin Barnes. This circuit closer comprises the terminals T, T connected in the electric cir- .cuit w and adapted to support warp threads, w, w on each of which warp threads is sustained, under normal conditions, one of the circuit closers C, C which are slidably engaged with the terminals t, t, of said circuit w,1 and are adapted when they slide downward on their terminals 15, t to swing into contact with the terminals T, T to close said circuit w-y to effect the energizing of the magnet 22;

Preliminary to the operation of the loom the guide arm 16 is adjusted as to height and as to the spacing of its end 17 from the arm 20 so that as the puller 24 slides back and forth on said end 17 the hook 25 will, under normal conditions, justclear the-stud 28 of the shipper lever mechanism 27, and if desirable, this'member 27 may also be adjusted to space its stud 28 relative to the path of the hook 25. Such adjustment of the arm 16 is also for the purpose of so sustaining the puller 24 that at the limit of each forward movement of the vibrator the magnet 22 will be brought into contact with its armature 26 whereby the lodging of any foreign matterbetween these parts may be avoided and the armature may be retained and lifted by the magnet, if the electric circuit wg is completed without the necessity of employing electric current of a strength necessary to energize the magnet to attract and lift the armature and its puller 24.

When, in the operation of the loom, the electric circuit m 1 is closed, as by one of the circuit closers C, C, the magnet 22 will, at the next forward movement of its vibrator as above stated, contact with and magnetically hold the armature 26 and, on the next backward movement of said vibrator, will lift said armature and its puller or actuator arm 24 to a position where the hook 25 of said puller may engage the stud 28 so that as said puller 24: is drawn backward its hook will efiect the pulling of the shipper lever to a point at which said lever is free to move to efiect the stopping of the-loom through some well known instrumentality.

While I have herein shown and described one construction of my improved stop motion it is not my intention thereby to limit my invention except as hereinafter claimed.

Having thus described my invention 1 claim as new and desire to secure by Letters Patent.

1. A stop motion comprising a vibratory shipper actuator having a pivoted actuator arm, cooperating magnetic holding means on said actuator and arm, means to sustain and guide said arm in its inoperative movement, and an electric circuit in connection with one of said magnet members and having circuit closing means.

2. A stop motion comprising a vibratory member having a magnet, a pivoted actuator arm carried by said member and having an armature to cooperate with said magnet, means to sustain said arm whereby said magnet may effect mechanical contact with said armature at the limit of its movement in the inoperative direction, said magnet having an electric circuit provided with circuit closers.

3. A stop motion of the nature described comprising a vibrator member having a magnet, means for vibrating said vibrator from a going part of a loom, a puller arm pivotally mounted on said vibrator below said magnet and having an armature to cooperate therewith, and an electric circuit in connection with said magnet and having circuit closers.

4. A stop motion of the nature described comprising a bracket having a shaft, a guide arm adjustably mounted on said shaft, a yibrator mounted to swing on said shaft and having a magnet, a puller arm pivotally mounted on said vibrator below said magnet and having an armature, said puller arm sustained and guided by said guide arm, means for effecting the operation of said vibrator and an electric circuit including said magnet and having circuit closers.

JOSEPH J. SMITH.

Witnesses:

HENRY J. MILLER, ESTHER C. MURPHY. 

